In-situ alloying of AlSi10Mg+Si using Selective Laser Melting to control the coefficient of thermal expansion

Research output: Contribution to journalArticlepeer-review

Standard

In-situ alloying of AlSi10Mg+Si using Selective Laser Melting to control the coefficient of thermal expansion. / Hanemann, Theresa; Carter, Luke N.; Habschied, Moritz; Adkins, Nicholas J.E.; Attallah, Moataz M.; Heilmaier, Martin.

In: Journal of Alloys and Compounds, Vol. 795, 30.07.2019, p. 8-18.

Research output: Contribution to journalArticlepeer-review

Harvard

APA

Vancouver

Author

Bibtex

@article{148fc39a81254634a5bb2d5febf8c47c,
title = "In-situ alloying of AlSi10Mg+Si using Selective Laser Melting to control the coefficient of thermal expansion",
abstract = "Selective Laser Melting (SLM) was investigated as new processing route for strongly hypereutectic AlSi alloys for thermal management applications in space industry. Processing conditions, microstructure and thermal expansion behavior were analyzed for AlSi10Mg + Si alloys with 25 wt% and 50 wt% Si fabricated by in-situ SLM of powder mixtures. For both Si compositions parts with densities ≥ 99% could be achieved using laser power ≥ 275 W and scan speeds ≥ 1500 mm/s for the alloy containing 25 wt% Si and laser power of 400 W and scan speeds ≥ 1500 mm/s for the alloy containing 50 wt% Si. Considerable refinement of primary and eutectic Si was achieved for both Si compositions due to the high cooling rates of SLM. The mean particle size for the coarse primary Si of the 50 wt% Si containing alloy was below 10 μm. Additionally, unmolten Si powder particles were observed. Measurements of the coefficient of thermal expansion (CTE) showed the tailorability of CTE with adjustment of Si content. A decrease in CTE of 43% compared to pure Al was achieved at a total Si content of 50 wt%. Experimental data was close to model calculations based on the rule of mixture and the Turner model depending on the different microstructures of the two alloy compositions.",
keywords = "Hypereutectic Al-Si alloy, Microstructure, Selective laser melting, Thermal expansion",
author = "Theresa Hanemann and Carter, {Luke N.} and Moritz Habschied and Adkins, {Nicholas J.E.} and Attallah, {Moataz M.} and Martin Heilmaier",
year = "2019",
month = jul,
day = "30",
doi = "10.1016/j.jallcom.2019.04.260",
language = "English",
volume = "795",
pages = "8--18",
journal = "Journal of Alloys and Compounds",
issn = "0925-8388",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - In-situ alloying of AlSi10Mg+Si using Selective Laser Melting to control the coefficient of thermal expansion

AU - Hanemann, Theresa

AU - Carter, Luke N.

AU - Habschied, Moritz

AU - Adkins, Nicholas J.E.

AU - Attallah, Moataz M.

AU - Heilmaier, Martin

PY - 2019/7/30

Y1 - 2019/7/30

N2 - Selective Laser Melting (SLM) was investigated as new processing route for strongly hypereutectic AlSi alloys for thermal management applications in space industry. Processing conditions, microstructure and thermal expansion behavior were analyzed for AlSi10Mg + Si alloys with 25 wt% and 50 wt% Si fabricated by in-situ SLM of powder mixtures. For both Si compositions parts with densities ≥ 99% could be achieved using laser power ≥ 275 W and scan speeds ≥ 1500 mm/s for the alloy containing 25 wt% Si and laser power of 400 W and scan speeds ≥ 1500 mm/s for the alloy containing 50 wt% Si. Considerable refinement of primary and eutectic Si was achieved for both Si compositions due to the high cooling rates of SLM. The mean particle size for the coarse primary Si of the 50 wt% Si containing alloy was below 10 μm. Additionally, unmolten Si powder particles were observed. Measurements of the coefficient of thermal expansion (CTE) showed the tailorability of CTE with adjustment of Si content. A decrease in CTE of 43% compared to pure Al was achieved at a total Si content of 50 wt%. Experimental data was close to model calculations based on the rule of mixture and the Turner model depending on the different microstructures of the two alloy compositions.

AB - Selective Laser Melting (SLM) was investigated as new processing route for strongly hypereutectic AlSi alloys for thermal management applications in space industry. Processing conditions, microstructure and thermal expansion behavior were analyzed for AlSi10Mg + Si alloys with 25 wt% and 50 wt% Si fabricated by in-situ SLM of powder mixtures. For both Si compositions parts with densities ≥ 99% could be achieved using laser power ≥ 275 W and scan speeds ≥ 1500 mm/s for the alloy containing 25 wt% Si and laser power of 400 W and scan speeds ≥ 1500 mm/s for the alloy containing 50 wt% Si. Considerable refinement of primary and eutectic Si was achieved for both Si compositions due to the high cooling rates of SLM. The mean particle size for the coarse primary Si of the 50 wt% Si containing alloy was below 10 μm. Additionally, unmolten Si powder particles were observed. Measurements of the coefficient of thermal expansion (CTE) showed the tailorability of CTE with adjustment of Si content. A decrease in CTE of 43% compared to pure Al was achieved at a total Si content of 50 wt%. Experimental data was close to model calculations based on the rule of mixture and the Turner model depending on the different microstructures of the two alloy compositions.

KW - Hypereutectic Al-Si alloy

KW - Microstructure

KW - Selective laser melting

KW - Thermal expansion

UR - http://www.scopus.com/inward/record.url?scp=85065077334&partnerID=8YFLogxK

U2 - 10.1016/j.jallcom.2019.04.260

DO - 10.1016/j.jallcom.2019.04.260

M3 - Article

AN - SCOPUS:85065077334

VL - 795

SP - 8

EP - 18

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

SN - 0925-8388

ER -